Catalog Syndication Across Marketplaces and Ad Channels

Syndication fails at identity, not at transport. Every channel holds its own idea of what one product is: Google and Meta group variants with item_group_id, Amazon hangs children off a parent under a variation theme, Shopee keeps models inside a single listing with stock and price per model, and a channel that guesses wrong will merge two of your SKUs or split one into six. Getting a catalog onto five channels takes a few weeks. Keeping the same product recognisable across those five channels for two years is the work, and it is the part nobody owns. Where these programmes break: Category mapping gets treated as a launch task rather than a maintained asset, so nobody notices when a marketplace splits a category and half your listings fall out of the browse tree. Stock is syndicated as one number, so a channel with a four-day fulfilment lead time oversells against one that ships the same day. Price is syndicated without a policy, so the brand undercuts its own stockists on a marketplace and hears about it from a distributor rather than from a report. Each of those is a decision the business has to make. I will not make them for you, and I will not start building until they are made. What I build: An identity model that survives the differences, meaning a source-of-truth variant structure with each channel's expression of it documented, so one shoe in three sizes stays one product everywhere. Mapping tables for each channel's taxonomy and required attributes, with an owner and a review cadence written into the handover rather than assumed. Stock buffers set per channel against lead time and observed cancellation rate instead of one figure applied everywhere. A pricing rule that encodes the policy your commercial team signed, including the channels where the fee structure makes a product unprofitable and it should simply not be listed. Southeast Asian specifics: Shopee and Lazada enforce category-level attribute requirements that change with little notice, and TikTok Shop moderates images as closely as text. Listings that pass in Singapore routinely fail in Indonesia or Vietnam on local requirements and language. I work in English and Mandarin and have run these accounts from Singapore long enough to know which local failures are worth automating around and which are cheaper to handle by hand, which is a judgement no tool vendor will make for you. Not included: Marketplace account opening, seller verification and tax registration. Warehousing, fulfilment and returns. Marketplace advertising, which is a different engagement with a different measurement problem. Translation into Bahasa Indonesia, Thai or Vietnamese: I specify what must be translated and review the result against category requirements, but a native writer does the writing. Who this is not for: Brands who want channels added faster than operations can serve them. A marketplace seller metric damaged by late dispatch takes months to recover and no amount of catalog work compensates for it. Resellers listing parallel-imported stock, which I decline. Teams who treat channel count as the outcome: three channels served properly beat seven each carrying a stale price, and I would rather make the argument for cutting two than accept the brief as written. How it runs, and what stays behind: Discovery on the source catalog and the commercial constraints first, then a channel-by-channel decision on whether to list at all, then one channel built to completion before the next begins, so the identity model is proven before it is copied. What stays behind is the mapping tables, the change log, every rule with the reason it exists, and a named owner for each channel inside your team.